nft

# 🧩 ZKP-Based NFT Smart Contract (No Imports / No Constructors / No Inputs)

### Overview

This project implements a Zero-Knowledge Proof (ZKP)–inspired NFT minting system written entirely in Solidity, with no imports, no constructors, and no input fields in its external functions.

It simulates a zero-knowledge verification mechanism that allows only verified users to mint NFTs — without ever revealing their personal data or passing explicit parameters.

---

## 🛠 Features

- ✅ Zero-Knowledge Simulation

Users call verifySelf() with no inputs.

The contract internally computes a verification hash and determines if the user is valid — no sensitive data is exposed.

- 🪙 NFT Minting (No Inputs)

Verified users can mint NFTs by simply calling mintNFT().

Each NFT is uniquely tied to the user’s address.

- 🔐 Admin Controls (No Inputs)

The admin can:

- Initialize themselves initAdmin())

- Pause/unpause the contract

- Self-verify for demo/testing

- 🧾 No Imports, No Constructors, No Inputs

Entire logic is contained within a single Solidity file and uses only built-in features.

This ensures simplicity, transparency, and full on-chain verification.

---

## 📜 Contract Details

| Property | Value |

|-----------|--------|

| Name | ZKP NFT |

| Symbol | None (Minimal implementation) |

| Network | Ethereum-compatible (EVM) |

| Solidity Version | ^0.8.19 |

| Contract Address | 0xC8d5B8757145Ca1C96447acE170D239a6f4730cf |

---

## ⚙️ Functions Summary

### 🔧 Admin Functions

- initAdmin() — Set the deploying account as admin (once only).

- togglePause() — Pause/unpause the contract.

- adminVerifySelf() — Mark admin as verified manually (for testing).

### 🧩 User Functions

- verifySelf() — Simulated ZKP validation (no inputs).

Uses internal hash condition to confirm verification.

- mintNFT() — Mint NFT if verified (no inputs).

Mints one unique NFT per call.

- myTokens() — View all NFTs owned by the caller.

- amIVerified() — Check if the caller is verified.

- myFirstTokenOwner() — Get owner address of the caller’s first token.

---

## 🚀 Deployment Info

Deployed Address:

0xC8d5B8757145Ca1C96447acE170D239a6f4730cf

Deployed Network:

Flow testnet

---

## 🔒 Zero-Knowledge Simulation Logic

The verifySelf() function computes: